1.6%瑞香狼毒素水乳剂对4种蔬菜害虫的作用方式比较  

Comparison of different actions of 1.6% daphneantoxin EW on four vegetable pests

作　　者：宋丽雯[1] 张新虎[1] 沈慧敏[1] Song Liwen Zhang Xinhu Shen Huimin(College of Plant Protection, Gansu Agricultural University, Laboratory of Bio-control Engineer for Crops Disease and lnsect Pests of Gansu Province, Lanzhou 730070, Chin)

机构地区：[1]甘肃农业大学植物保护学院甘肃省农作物病虫害生物防治工程实验室,兰州730070

出　　处：《植物保护》2017年第1期218-223,共6页Plant Protection

基　　金：公益性行业(农业)科研专项(201103020);甘肃省农业生物技术研究与应用开发项目(GNSW-2012-20);甘肃省自然科学基金(1606RJZA025)

摘　　要：采用叶片夹毒法、微量点滴法和玻片浸渍法等方法测定了1.6%瑞香狼毒素水乳剂对菜青虫、小菜蛾、豌豆蚜和截形叶螨的杀虫效果。结果表明:处理24h后,在触杀活性试验中,1.6%瑞香狼毒素水乳剂对试虫的毒力大小为菜青虫>小菜蛾>豌豆蚜>截形叶螨;在内吸活性试验中,1.6%瑞香狼毒素水乳剂对截形叶螨和豌豆蚜的LC50分别为149.22mg/L和101.76mg/L,均小于触杀作用下的219.10mg/L和165.25mg/L,表明1.6%瑞香狼毒素水乳剂对豌豆蚜和截形叶螨内吸毒性明显优于触杀作用;在胃毒活性试验中,1.6%瑞香狼毒素水乳剂对菜青虫和小菜蛾的LC50分别为342.82mg/L和407.34mg/L,而触杀作用下的LC50为58.61mg/L和75.30mg/L,表明该药剂对菜青虫和小菜蛾有较强的触杀作用和一定的胃毒作用。The activity of 1.6% daphneantoxin EW on Pieris rapae, Plutella xylostella, Acyrlhosiphon pisum, Tetranychus truncatus was determined by slide slip method, topical application and leaf-sandwich. Laboratory bio- assay results showed that the order of contact toxicity of 1.6% daphneantoxin EW against 4 insects was P. rapae〉 P. xylostella〉A, pisum〉 T. lruncatus. Systemic toxicity analysis indicated that the median lethal concentration （LC50） values for T. truncatus and A. pisum were 149.22 mg/L and 101.76 mg/L, respectively, significantly Rower than that of contact toxicity （219.10 mg/L and 165.25 mg/L）. Stomach toxicity test by leaf-sandwich indicated that the median lethal concentrations （LC50） for P. rapae and P. xylostella were 342.82 mg/L and 407.34 mg/L, re- spectively, while the contact toxicity test showed the LC50 values for P. rapae and P. xylosteUa were 58.61 mg/L and 75.30 mg/L, respectively. The above results demonstrated that 1.6% daphneantoxin EW had good contact toxicity and some stomach toxicity on P. rapae and P. xylostella.

关 键 词：瑞香狼毒素 菜青虫 小菜蛾 豌豆蚜 截形叶螨 

分 类 号：S482.1[农业科学—农药学]